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All results from a given calculation for Al(CH3)3 (trimethyl aluminum)

using model chemistry: B3PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at B3PW91/6-31+G**
 hartrees
Energy at 0K-362.114347
Energy at 298.15K-362.121731
HF Energy-362.114347
Nuclear repulsion energy150.285989
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B3PW91/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3128 3004 0.00      
2 A' 3030 2909 0.00      
3 A' 1455 1397 0.00      
4 A' 1239 1189 0.00      
5 A' 596 572 0.00      
6 A' 512 491 0.00      
7 A" 3103 2979 42.38      
8 A" 1458 1400 12.19      
9 A" 730 701 96.10      
10 A" 182 174 7.36      
11 A" 46 44 0.01      
12 E' 3129 3004 26.93      
12 E' 3129 3004 26.93      
13 E' 3028 2907 17.36      
13 E' 3028 2907 17.36      
14 E' 1453 1395 2.41      
14 E' 1453 1395 2.41      
15 E' 1236 1186 54.43      
15 E' 1236 1186 54.44      
16 E' 766 736 157.58      
16 E' 766 736 157.57      
17 E' 641 615 15.54      
17 E' 641 615 15.55      
18 E' 169 162 4.56      
18 E' 169 162 4.56      
19 E" 3103 2979 0.00      
19 E" 3103 2979 0.00      
20 E" 1457 1399 0.00      
20 E" 1457 1399 0.00      
21 E" 567 545 0.00      
21 E" 567 545 0.00      
22 E" 18 17 0.00      
22 E" 18 17 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23305.3 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 22375.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B3PW91/6-31+G**
ABC
0.16411 0.16411 0.08595

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31+G**

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 0.000
C2 0.000 1.972 0.000
C3 -1.708 -0.986 0.000
C4 1.708 -0.986 0.000
H5 -1.007 2.403 0.000
H6 -1.578 -2.074 0.000
H7 2.585 -0.329 0.000
H8 0.530 2.367 0.877
H9 0.530 2.367 -0.877
H10 -2.315 -0.724 0.877
H11 -2.315 -0.724 -0.877
H12 1.785 -1.643 0.877
H13 1.785 -1.643 -0.877

Atom - Atom Distances (Å)
  Al1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13
Al11.97221.97221.97222.60592.60592.60592.57952.57952.57952.57952.57952.5795
C21.97223.41593.41591.09574.34303.46111.09851.09853.66063.66064.12594.1259
C31.97223.41593.41593.46111.09574.34304.12594.12591.09851.09853.66063.6606
C41.97223.41593.41594.34303.46111.09573.66063.66064.12594.12591.09851.0985
H52.60591.09573.46114.34304.51364.51361.77061.77063.50173.50174.99374.9937
H62.60594.34301.09573.46114.51364.51364.99374.99371.77061.77063.50173.5017
H72.60593.46114.34301.09574.51364.51363.50173.50174.99374.99371.77061.7706
H82.57951.09854.12593.66061.77064.99373.50171.75454.20154.55314.20154.5531
H92.57951.09854.12593.66061.77064.99373.50171.75454.55314.20154.55314.2015
H102.57953.66061.09854.12593.50171.77064.99374.20154.55311.75454.20154.5531
H112.57953.66061.09854.12593.50171.77064.99374.55314.20151.75454.55314.2015
H122.57954.12593.66061.09854.99373.50171.77064.20154.55314.20154.55311.7545
H132.57954.12593.66061.09854.99373.50171.77064.55314.20154.55314.20151.7545

picture of trimethyl aluminum state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Al1 C2 H5 113.174 Al1 C2 H8 111.068
Al1 C2 H9 111.068 Al1 C3 H6 113.174
Al1 C3 H10 111.068 Al1 C3 H11 111.068
Al1 C4 H7 113.174 Al1 C4 H12 111.068
Al1 C4 H13 111.068 C2 Al1 C3 120.000
C2 Al1 C4 120.000 C3 Al1 C4 120.000
H5 C2 H8 107.597 H5 C2 H9 107.597
H6 C3 H10 107.597 H6 C3 H11 107.597
H7 C4 H12 107.597 H7 C4 H13 107.597
H8 C2 H9 105.990 H10 C3 H11 105.990
H12 C4 H13 105.990
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.943      
2 C -0.822      
3 C -0.822      
4 C -0.822      
5 H 0.172      
6 H 0.172      
7 H 0.172      
8 H 0.168      
9 H 0.168      
10 H 0.168      
11 H 0.168      
12 H 0.168      
13 H 0.168      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.344 0.000 0.000
y 0.000 -37.344 0.000
z 0.000 0.000 -31.308
Traceless
 xyz
x -3.018 0.000 0.000
y 0.000 -3.018 0.000
z 0.000 0.000 6.036
Polar
3z2-r212.073
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.092 0.000 0.000
y 0.000 10.092 0.000
z 0.000 0.000 7.271


<r2> (average value of r2) Å2
<r2> 152.375
(<r2>)1/2 12.344